horn trouble

[jdhpioneer]

So I'm trying to diagnose why my horn is not working. Can someone please tell me where the horn fuse and relay are. I have put a jumper directly from horn to power and it works. I have also pull horn button apart and cleaned a bit of rust off the contact point. I'm working on a 91 . Thanks

[Jeepman]

Relay is up under the dash...

 

Should look something like this...

 

[jdhpioneer]

Driver side/passenger side? I don't hear any clicking from a relay when I press the horn button. Fuse location? Its not marked on either of my fuse boxes. Thanks for the picture

[Jeepman]

You will not hear a click if the relay is bad or doesn't have power...

 

should be Driver side if my memory is correct...

[jdhpioneer]

You will not hear a click if the relay is bad or doesn't have power...

 

should be Driver side if my memory is correct...

 

Thanks. I've been under wheel for awhile and can't seem to locate. Any thought on where the fuse should be?

[relyt120]

its near the fuse block off to the left

[jdhpioneer]

Hmm ill have to have a look and see.

[Jeepman]

was it working and then stopped or has it never worked?

 

If never worked maybe the relay was removed which is why you can't see it otherwise it should be there...

 

I don't have a picture of a Dash to look up...

[HOrnbrod]

The horn is fused in the drivers side footwell fuse box, fuse #11, 25A, marked HOLD/DLY on the 91 models.

[jdhpioneer]

I found the fuse HD LP FLY 25 amp. Fuse is good. Maybe I am missing the relay. Not seeing any unused connectors in that area though

[jdhpioneer]

Damn auto correct it says HD LP DLY

[jdhpioneer]

I bought the truck about 4 months ago. It has never worked. Never really bothered me. Got an inspection coming up and was hoping to fix it right.

[HOrnbrod]

That's the correct fuse. The following is straight from the 91 FSM:

 

The horn relay is located on a bracket of 3 relays behind the instrument panel.

 

I have never had a horn problem so have not searched for the horn relay. And there is no picture of it in the FSM. Advise you to stick your noggin under there and look up for a bracket with relays on it.  :dunno:  More brilliant engineering by Jeep..................

[jdhpioneer]

Thanks. I'm gonna stick my head up in there again tomorrow. I've got a pretty comfy way figured out that involves my leg being hung over the door.

[ScottJeep]

best the internet has to offer.... sorry too lazy to drag myself outside and around the house.

 

 

[gogmorgo]

The horn relay on my '91 was dangling loose under my dash when I got it. It looks like it might once have been velcroed to the lower dash panel, but it was also on a bracket with another relay, so I'm not positive... it may simply have been unbolted and never bolted back in. So yeah, two relays together under the driver's side of the dash. Mine was black, not white.

 

Also, even though my relay was bad, that wasn't the entire reason my horn wasn't working. The horn button stuff under the steering wheel lock plate in the steering column has a couple different styles, and they come with different length lock plate springs. Someone had obviously pulled my column apart at some point and put the wrong spring back in. When they couldn't put the lock plate back on, their solution was to pull out the horn cam... yes it "fixed" the problem, but it also removed a part critical to the horn working... idiots.  :shake:

 

Obviously the chances of that being your problem are slim, so make sure your relay is working before you start pulling apart your column. But here's a link to my thread from when I was trying to get my horn to work: http://comancheclub.com/topic/40798-horn-button-missing-bits-and-pieces-i-think/

[fiatslug87]

Make sure the horn is bolted down tight. When I added the second horn it would not work until I tightened it down really well. The FSM also says to use the correct type of screw.

 

[gogmorgo]

Yup, the horn grounds through the mount, although the OP said his horn works when he jumps it from the battery...